Although a REALLY small point, I remember once watching Bolton and on corner kicks wondering why, when defending, they had one guy basically standing between the corner of the box and the corner taker. It turns out, based on analysis, Sam was placing a player in the 5m radius where the majority of corner clearances land.
Most managers would be happy with the initial clearing of a corner. Sam was looking at how to use it to launch a counter attack.
Yes, this. He's a very astute manager, well ahead of the game. There's still some dickheads (mostly West Ham fans, who still hanker after some mythical football style they never had anyway) who equate using planning, sports science, sports psychology, (one of the first in the PL to use these), plans B & C - and come up with a one word derogatory answer, 'Hoofball'.